Improvement in sash-fastenings



ATENT VILLIAM SHAV, OF HUDSONpNEW YORK.

IMPROVEMENT IN SASH-FASTENINGS.

. Specification forming part of Letters Patent No. 43,60, dated July 19, 1864.

To all whom it may concern.'

Be it known that l, WILLIAM SHAW, of the city ofHudson, in the county of Columbia and State of New York, have invented a new and useful improvement in devices for elevating and locking window-sashes, which I call a double-spring sash lock and elevator;77 and yI do hereby declare that the following is a full, clear, and exact description of the construction and operation. of the same, reference being had to the drawings annexed, forming a part of this specification, ot' which- Figure 1 is an outside view, when closed, showing the sliding thumb-piece, arm, and elbow and catch attached. Fig. 2 is a perspective view representing it in position, a portion of the jamb-casin g ofthe window being removed. Fig. 3 is a view of the interior, the top of the case or box being removed so as to exhibit the springs, pinions with eccentric hub, &c.

Letter A represents the cast-iron case or box which incloses the springs, pinions, &c. B is the eccentric hub or reel; G, hridgepiece or partition; D, cog wheel or pinion; E, spiral spring; F, face or front edge ot' box A 5 G, rack in edge of sash 5 H, jamb-casing, I, dovetail groove to receive and wed ge one end of spring E; K, socket or recess-castin inside of box A to secure the other end of spring E; L, same in lower compartment; M, thuinb-piece, arm, elbow, and catch combined; N, locking-catch, O, elliptic spring which operates the catch N,

a a,arms; b b,projecting guards; c c', notches :in sides of arms a a s s', slots or mortises in shell of box A.

To enable those skilled in the art to make and use my invention,l will proceed to describe its construction and operation.

It consists of a light cast-iron shell or'case, A, containing two apartments, or, rather, compartments, each of which, when complete and in position, incloses a spiral spring, E, one aiove the other, but not in the same plane, a cog wheel or pinion,D, an elliptic spring, O, and an eccentric hub or reel, B, attached to the pinion D near its center, with its dovetail groove I. The bridge-piece C is common to both and useful to both of the compartments. The cogs of pinion D project through openngs in the face F, and match into a rack, G, secured in a groove in the adjoining edge of each sash. This rack is let into the groove so tha-tthe ends of the cogs will be nearly, butnot quite, flush with the edge of the sash, beinga little below. Un each o'f the pinions a hub or reel, B, is cast eccentricthat is, placed a little on one side ofthe center or axis ofthe pinion. (See Fig. 3, lower compartment.) Each hub is provided with a dovetail groove, I, to receive one end of a spiral spring, E, which winds around the hub or reel B, the other end being secured in sockets or recesses K in upper, and L in lower, compartment. The pinions are placed on opposite sides of the box or case A, and operate the upper and outer one on the upper sash, and the lower and inside one on the lower sash. The operating medium of this device (represented by the letter M) is the thumb-lever, arm, or elbow and catch, all connected and constituting one piece, and secured to the outside of the case A, one end passing through slots or mortises s s" in the sides of the case. On this is the catch N, which is forced between the teeth of pinion D by means of the spring 0, placed behind the same. rlhe other pinion in the neighboring apartment is provided with similar arrangements and devices for the same or asimilar purpose. The use of the bridge-piece C is to keep the springs E E in place, to hold the lidscrews of box, and to'form stops or bearings for one end ofthe springs O O. The size and strength of the spiral springs E E are made proportionate to the weight of the sash to be elevated.

c c' are notches in the side of the thumblever arms a c', which, catching on the edge of the iianges or project-ing guard b b when pressed back, hold them so that the sashes may be moved up or down freely without the interference of the catch N, and the same as it' no catch were there.

Having described the construction of myA pinions project through the face or front of the lock sufficient to engage the gear in the rack p ing the thumb-piece M' back, so as to diseuA gage the catch N' from the cogs of pinion D', the sash will by the aid of spring E' be elevated with the same ease and facility as with cords and weights. The thumb being removed from the thumb-piece M, catch N en gages the cogs on the back side of pinions, and locks the sash at any point of elevation desired. On the opposite edge of light sash l usJ small friction-rollers.

The above-described device differs from all others, in being a double spring elevator and lock combined, and so arranged and inclosed in case A as to operate on both the upper and lower sash at the same or at different times, ai may be required; and I claim for it the following as some of the advantages it possesses over pulleys, weights, and cords: First, it is cheaper; second, it is less liable to get out of order; third, the sashes are more easily removed to be cleaned or repaired; fourth, it is more durable; lifth, it greatly diminishes` the expense of constructing the window-frames, as no boxes are required; sixth, it being aloek as well as' elevator, no sash-locks, required with weights and pulleys, need be provided.

l am aware that spiral springs have been employed singly to aid in elevating windowsashes. I do not, therefore, claim this, nor do I claim the use otl the rack and pinion for this purpose; but

What I claim, and desire to secure by Let- \ters Patent of the United States, is

1. Inclosingin caseAthe two spiral springs .E E', when each is attached to the eccentric hub and arranged and combined with their respective pinions D'D' substantially in the manner and for the purpose set forth.

2. The case or box A, constructed as set forth.

3. The two sliding catches N N', with their elbows, arms, and thumb-pieces combined, when arranged in connection with the pinions D D', springs O O', and case A, substantially as and for the purpose described.

WILLIAM SHAW.

Witnesses HIRAM W. DIXON, JAs. C. REGUsoN. 

